Download AP: CHAPTER 26: ORIGIN OF LIFE

Name __________________________________
Ms. Foglia
Period _________
Date ______________________
AP: CHAPTER 26: ORIGIN OF LIFE
1. Start with the origin of the earth and identify the time frame, conditions, and evidence for
each of the following steps leading to current life forms on earth.
a. Origin of the earth ________________________________________________________
___________________________________________________________________________
b. Prokaryotes _____________________________________________________________
___________________________________________________________________________
c. Oxidizing atmosphere _____________________________________________________
___________________________________________________________________________
d. Eukaryotic cells __________________________________________________________
___________________________________________________________________________
e. Multicellular life __________________________________________________________
___________________________________________________________________________
2. What was significant about the discovery of the iron oxide bands in the sedimentary layers.
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
3. Describe the theory of endosymbiosis. ___________________________________________
___________________________________________________________________________
___________________________________________________________________________
1 of 5
2004-2005
Name __________________________________
Ms. Foglia
4. Why did evolution seem to slow 750 to 570 million years ago?
___________________________________________________________________________
___________________________________________________________________________
5. What was special about the Cambrium Explosion?
___________________________________________________________________________
___________________________________________________________________________
6. Describe a few adaptations essential for the invasion of plants onto land.
___________________________________________________________________________
___________________________________________________________________________
7. Scientific Hypothesis for the origin of life
a. The first cells may have originated by chemical evolution on a young Earth
b. Abiotic synthesis of organic monomers is a testable hypothesis
c. Laboratory simulations of early-Earth conditions have produced organic polymers
d. RNA may have been the first genetic material
e. Protobionts can form by self-assembly
f.
Natural selection could refine protobionts containing hereditary information
g. Debate about the origin of life abounds
8. Describe the hypothesized conditions on earth when life arose. _______________________
___________________________________________________________________________
___________________________________________________________________________
9. What did Louis Pasteur demonstrate with his experiment? ___________________________
2 of 5
2004-2005
Name __________________________________
Ms. Foglia
___________________________________________________________________________
___________________________________________________________________________
10. List the four stages for the formation of life.
a.
_______________________________________________________________________
b.
_______________________________________________________________________
c.
_______________________________________________________________________
d.
_______________________________________________________________________
11. What metabolic processes would you expect to see in protobionts?
___________________________________________________________________________
___________________________________________________________________________
12. Why is RNA now thought to be the first genetic code?
___________________________________________________________________________
___________________________________________________________________________
13. What did Oparin, Haldane, Miller and Urey accomplish?
___________________________________________________________________________
___________________________________________________________________________
14. What are some of the possible locations for the first life forms?
___________________________________________________________________________
___________________________________________________________________________
15. What is the basis of the classification system developed by Linneaus?
___________________________________________________________________________
3 of 5
2004-2005
Name __________________________________
Ms. Foglia
___________________________________________________________________________
16. Why is taxonomy considered a work in progress?
___________________________________________________________________________
___________________________________________________________________________
17. What are two problems with the five kingdom system of classification?
a. ________________________________________________________________________
___________________________________________________________________________
b. ________________________________________________________________________
___________________________________________________________________________
18. How has the Domain System altered our view of taxonomy?
___________________________________________________________________________
___________________________________________________________________________
19. Which prokaryote is closer to the eukaryotes? List several reasons for your answer.
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
20. Place the following metabolic processes in an order that fits this hypothesis for the origin of
life: Photosynthesis, Aerobic Respiration, Fermentation, Nucleic Acid replication (RNA or
DNA), Membrane transport
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
4 of 5
2004-2005
Name __________________________________
Ms. Foglia
21. Label the diagram to explain the Miller and Urey experiment to test the Abiotic Synthesis
hypothesis.
22. Label the diagram to indicate the major events, the time frame, and the geologic eras the
origin of life on Earth.
5 of 5
2004-2005